Activity of Maly Aktru Glacier (Сentral Altai) and changes tree line fluctuations in its basin for a historical period

Nazarov, Andrey; Myglan, Vladimir S.; Орлова, Л. А.; Овчинников, И. Ю.

doi:10.15356/2076-6734-2016-1-103-118

Cited by 10 publications

(7 citation statements)

References 4 publications

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“…An upward altitudinal shift of vegetation zones and glacier retreat has already been observed in upper Aktru Valley due to a rapid warming in recent decades (Davydov and Timoshok 2010;Nazarov et al 2016;Gatti et al 2019). Davydov and Timoshok (2010) estimated the root biomass in the top 10 cm of soils after 50 and 100 years of glacier retreat to be 0.25 and 0.75 kg C m -2 , respectively.…”

Section: Global Warming Impacts On Soc Storagementioning

confidence: 97%

Soil organic carbon storage in a mountain permafrost area of Central Asia (High Altai, Russia)

Pascual

Kuhry

Raudina

2020

Ambio

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The thawing and subsequent decomposition of large stocks of soil organic carbon (SOC) currently stored in the northern circumpolar permafrost region are projected to result in a ‘positive’ feedback on global warming. The magnitude of this feedback can only be assessed with improved knowledge about the total size and geographic distribution of the permafrost SOC pool. This study investigates SOC storage in an under-sampled mountain permafrost area in the Russian High Altai. SOC stocks from 39 soil pits are upscaled using a GIS-based land cover classification. We found that the top 100 cm of soils in Aktru Valley and the adjacent Kuray Basin only holds on average 2.6 ± 0.6 kg C m−2 (95% confidence interval), of which only c. 1% is stored in permafrost. Global warming will result in an upward shift of alpine life zones, with new plant cover and soil development at higher elevations. As a result, this type of mountain permafrost area might act as a net C sink in the future, representing a ‘negative’ feedback on global warming.

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Section: Global Warming Impacts On Soc Storagementioning

confidence: 97%

Soil organic carbon storage in a mountain permafrost area of Central Asia (High Altai, Russia)

Pascual

Kuhry

Raudina

2020

Ambio

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“…There is no unambiguity in the estimates of the time of the culmination of the LIA glaciers and the formation of the corresponding moraine in Altai. According to some authors [61], the time of the greatest advance of glaciers corresponded to the 17th century, but most researchers believe that the greatest advance of glaciers belongs to the beginning [62] or to the middle of the 19th century [25,59,63]. The time of the LIA maximum in Altai was not recorded by direct observations.…”

Section: Remote Sensingmentioning

confidence: 99%

Glacier Recession in Altay Mountains after the LIA Maximum

Ganyushkin¹,

Chistyakov²,

Derkach³

et al. 2022

Preprint

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The recent glaciation of the southern part of the Altai is estimated (1256 glaciers with the total area of 559.15±31.13 km2), the area of the glaciers of the whole Altai mountains is evaluated by 1096.55 km2. In the southern part of Altai 2276 glaciers with the total area of 1348.43±56.16 km2 were reconstructed, the first estimate of the LIA glacial area for the whole Altai mountain system is given (2288.04 km2). Since the LIA the glaciers decrease by 59% in the southern part of Altai and by 47.9% for the whole Altai. The ELA in the southern part of Altai increased averagely by 106 m. The higher changes of ELA in relatively humid areas is probably caused by decrease of precipitation. Glaciers of Tavan Bogd glacial center degraded with higher rates after 1968 relative to the interval between 1850-1968. One of the intervals of the fastest shrinkage of the glaciers in 2000-2010 was caused by unfavorable for the glaciers dry and warm interval 1989-2004. However, the fast decrease of the glaciers in 2000-2010 was mainly caused by the shrinkage or disappearance of the smaller glaciers, large valley glaciers started fast retreat after 2010.

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“…Quite frequently, in dozens of paleoclimatic studies, there are successive periods of varied thermal conditions in the northern hemisphere in the last 2000 years : 'the Roman Warm Period' (warm; ~100 BCE to ~200-300 CE), 'the Dark Agesby Büntgen et al, (2016) is called as 'Later Antique Little Ice Age' (chilly; ~400-700 CE), 'the Mediaeval Warm Period' (warm; ~900-1200-1300 CE), a multi-phase period of progressive cooling called the Little Ice Age (~1500-1850 CE), with its thermal minimum in the second part of 18 th and the first decades of 19 th centuries and the period of contemporary climate (~1850 to the present day), occasionally named 'the Anthropocene period' or 'the industrial climate period'. For example, deep into Asia (Altai), where all the above-mentioned climatic periods were documented, air temperature in the summer months during the Roman Warm Period (100 BCE -300 CE) was higher than nowadays (Nazarov et al, 2016). In Alaska, in the sub-arctic zone, Hu et al, (2001) find the same periods in the history of climate in the last twenty centuries, and state that both in the Roman Warm Period and in the Medieval Warm Period, temperatures were higher or the same as today.…”

Section: Fig 1 the Geographical Position Of Wrocław In Europementioning

confidence: 99%

Role of internal variability of climate system in increase of air temperature in Wrocław (Poland) in the years 1951–2018

Marsz¹,

Styszyńska

Bryś

et al. 2021

Preprint

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In the course of the annual air temperature in Wrocław (TWr variable) a rapid change of the thermal regime was found between 1987 and 1989. A similar temperature change has occurred in Central Europe. TWr increased by more than 1 deg a strong, statistically significant positive trend emerged. The analysis of processes showed that strong warming in the cold season of the year (December–March) occurred as a result of an increase in the NAO intensity and warming in the warm season as a result of increased sunshine duration. Multiple regression analysis has showed that the winter NAO Hurrell’s index explains 15% of TWr variance, and the sunshine duration of the ‘long day’ (April–August) period 49%, whereas radiative forcing 5.9%. This indicates that the factors incidental to the internal variability of the climate system explain 64% of the TWr variability and the effect of increased CO 2 concentration only ~6%. The reason for this rapid change of the thermal regime was a radical change in macro-circulation conditions in the Atlantic-European circular sector, which took place between 1988 and 1989. It has similarly changed the structure of the Central European weathers. The heat, which is the cause of warming in Wrocław, comes from an increase in solar energy inflow (April–August) and also is transported to Europe from the North Atlantic surface by atmospheric circulation (NAO). These results indicate that the role of CO 2 in shaping the contemporary temperature increase is overestimated, whereas internal variability of the climate system is underestimated.

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Activity of Maly Aktru Glacier (Сentral Altai) and changes tree line fluctuations in its basin for a historical period

Cited by 10 publications

References 4 publications

Soil organic carbon storage in a mountain permafrost area of Central Asia (High Altai, Russia)

Soil organic carbon storage in a mountain permafrost area of Central Asia (High Altai, Russia)

Glacier Recession in Altay Mountains after the LIA Maximum

Role of internal variability of climate system in increase of air temperature in Wrocław (Poland) in the years 1951–2018

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